A4 Conversion
Le Mans Master
Joined: Sep 2004
Posts: 7,027
Likes: 6
From: Shiloh Ohio
Well I can not help you, I ran a similar thread a few months ago. But if you do it I would be interested in the final outcome. I am thinking about buying a Z06 and having an A4 put in. musicc130@aol.com 
Burning Brakes
Joined: Dec 1999
Posts: 1,132
Likes: 40
From: Cedar Falls IA.
Cruise-In III Veteran
St. Jude Contributor '04
I did do the A4 conversion, the mechanical part wasn't bad at all but be prepared to replace both the engine harness and the tranny harness. It's best to get the harness's from a same year car since GM changed a few of the plugs that have to plug to the new harness. I bought all the conversion parts from an 04 and found out the hard way they changed, but once I got the harness's from a 99 everything went pretty easy. You do have to send in your pcm and get it re-flashed with a vin from an auto, then you can tune it for your set-up.
The conversion seems like a big deal but after you sell the 6 speed stuff its almost a break-even deal. I went with a Rodney transmission, and my best ever time before was a 10.80, first time at the track after the A4 with no other changes the car went 10.24, and I'm still learning how to launch it.
Eric
The conversion seems like a big deal but after you sell the 6 speed stuff its almost a break-even deal. I went with a Rodney transmission, and my best ever time before was a 10.80, first time at the track after the A4 with no other changes the car went 10.24, and I'm still learning how to launch it.
Eric
Thread Starter
Drifting
Joined: Apr 2004
Posts: 1,889
Likes: 0
From: ottawa ontario
Originally Posted by 99Z51R
I did do the A4 conversion, the mechanical part wasn't bad at all but be prepared to replace both the engine harness and the tranny harness. It's best to get the harness's from a same year car since GM changed a few of the plugs that have to plug to the new harness. I bought all the conversion parts from an 04 and found out the hard way they changed, but once I got the harness's from a 99 everything went pretty easy. You do have to send in your pcm and get it re-flashed with a vin from an auto, then you can tune it for your set-up.
The conversion seems like a big deal but after you sell the 6 speed stuff its almost a break-even deal. I went with a Rodney transmission, and my best ever time before was a 10.80, first time at the track after the A4 with no other changes the car went 10.24, and I'm still learning how to launch it.
Eric
The conversion seems like a big deal but after you sell the 6 speed stuff its almost a break-even deal. I went with a Rodney transmission, and my best ever time before was a 10.80, first time at the track after the A4 with no other changes the car went 10.24, and I'm still learning how to launch it.
Eric
What does the engine harness look like? i have the one that runs above the torque tube....If i get the two of them would it be plug and play from there?
Burning Brakes
Joined: Dec 1999
Posts: 1,132
Likes: 40
From: Cedar Falls IA.
Cruise-In III Veteran
St. Jude Contributor '04
If they are both from the same year as your car it would be plug and play. I had to buy a 99 set or I would have had to cut and splice some connectors and I didn't want to go that route.
Eric
Eric
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer